A woman was taken to hospital in life-threatening condition after a five-vehicle pileup in Oshawa yesterday morning. The collision involved a dump truck and four other vehicles, and occurred at around 8:20 in the area of Harmony Rd. and Tennyson Av. north of the 401. A baby strapped into a car seat was also taken to hospital for treatment but is expected to be in good condition. A collision reconstruction was conducted while Harmony Rd. was closed for several hours. The cause of the crash remains unknown.